A flexible hybrid strain energy harvester using piezoelectric and electrostatic conversion

Youngkee Eun, Dae Sung Kwon, Min Ook Kim, Ilseon Yoo, Jaesam Sim, Hee Jin Ko, Kyung Ho Cho, Jongbaeg Kim

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

A new design of flexible energy harvester to utilize piezoelectric and electrostatic energy conversion mechanisms simultaneously from a single mechanical energy source is proposed. This non-resonant type harvester enables low-frequency mechanical inputs to be converted to electricity, and the polymeric structures make the harvester mechanically flexible, allowing it to be applied to non-planar surfaces. The fabricated harvester generated peak- and average power densities of 159 and 1.79 μW cm -2 respectively by piezoelectric conversion, and 52.9 μW cm -2 and 1.59 nW cm -2 respectively by electrostatic conversion from an input force of 1.2 N at 3 Hz. Considering its flexibility and ability to harvest mechanical inputs at frequencies below 3 Hz, low-frequency human movements could be a potential energy source for the proposed hybrid harvester to exploit.

Original languageEnglish
Article number045040
JournalSmart Materials and Structures
Volume23
Issue number4
DOIs
Publication statusPublished - 2014 Jan 1

Fingerprint

Harvesters
Strain energy
Electrostatics
energy sources
electrostatics
low frequencies
energy conversion
electricity
energy
radiant flux density
flexibility
potential energy
Potential energy
Energy conversion
Electricity

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Civil and Structural Engineering
  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering

Cite this

Eun, Youngkee ; Kwon, Dae Sung ; Kim, Min Ook ; Yoo, Ilseon ; Sim, Jaesam ; Ko, Hee Jin ; Cho, Kyung Ho ; Kim, Jongbaeg. / A flexible hybrid strain energy harvester using piezoelectric and electrostatic conversion. In: Smart Materials and Structures. 2014 ; Vol. 23, No. 4.
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A flexible hybrid strain energy harvester using piezoelectric and electrostatic conversion. / Eun, Youngkee; Kwon, Dae Sung; Kim, Min Ook; Yoo, Ilseon; Sim, Jaesam; Ko, Hee Jin; Cho, Kyung Ho; Kim, Jongbaeg.

In: Smart Materials and Structures, Vol. 23, No. 4, 045040, 01.01.2014.

Research output: Contribution to journalArticle

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T1 - A flexible hybrid strain energy harvester using piezoelectric and electrostatic conversion

AU - Eun, Youngkee

AU - Kwon, Dae Sung

AU - Kim, Min Ook

AU - Yoo, Ilseon

AU - Sim, Jaesam

AU - Ko, Hee Jin

AU - Cho, Kyung Ho

AU - Kim, Jongbaeg

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AB - A new design of flexible energy harvester to utilize piezoelectric and electrostatic energy conversion mechanisms simultaneously from a single mechanical energy source is proposed. This non-resonant type harvester enables low-frequency mechanical inputs to be converted to electricity, and the polymeric structures make the harvester mechanically flexible, allowing it to be applied to non-planar surfaces. The fabricated harvester generated peak- and average power densities of 159 and 1.79 μW cm -2 respectively by piezoelectric conversion, and 52.9 μW cm -2 and 1.59 nW cm -2 respectively by electrostatic conversion from an input force of 1.2 N at 3 Hz. Considering its flexibility and ability to harvest mechanical inputs at frequencies below 3 Hz, low-frequency human movements could be a potential energy source for the proposed hybrid harvester to exploit.

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